org.activemath.learner.history
Class LearnerHistoryProvider

java.lang.Object
  org.activemath.learner.history.LearnerHistoryProvider

public class LearnerHistoryProvider
extends Object

The LearnerHistoryProvider provides configurable access to the different history implementations available (NoOpHistory, LeAMHistory as of August 11, 2006).

Field Summary

static String	AM
protected static Logger	log
static String	NOP

Method Summary

LearnerHistory	getDefaultHistory() returns the default LearnerHistory.
static LearnerHistoryProvider	getInstance() returns the singleton instance

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

log

protected static Logger log

AM

public static final String AM

See Also:

Constant Field Values

NOP

public static final String NOP

See Also:

Constant Field Values

Method Detail

getInstance

public static final LearnerHistoryProvider getInstance()

returns the singleton instance

Returns:

the singleton instance.

getDefaultHistory

public LearnerHistory getDefaultHistory()

returns the default LearnerHistory. If the default history can not be found, returns the NoOp Learner history. If that cannot be found, returns null.

Returns:

The default history, if found. Otherwise, the Noop history is returned, if it exists. If not, null is returned.